Anatomy study note · Upper limb

Extensor retinaculum of the wrist

A thickening of deep fascia across the back of the wrist that holds the long extensor tendons in place.

Key points

• Pisiform + hook of hamate → distal radius.
• Six synovial-lined tunnels for the extensor tendons.
• Superficial: basilic and cephalic veins, superficial radial nerve.
• Connective tissue: from leftover mesenchyme.
• Dense CT: irregular (capsules) or regular (tendons, ligaments).

The full note in the atlas also covers

Features · Histology · Development

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 3, PDF pp. 286, 289–290, 294
• Inderbir Singh’s Human Embryology, ch. 7, PDF pp. 94–95
• BRS Cell Biology & Histology, 7th ed., ch. 6, PDF p. 110

More from the upper limb

• Flexor carpi radialis
• Flexor carpi ulnaris
• Flexor digitorum profundus
• Flexor digitorum superficialis
• Flexor pollicis longus
• Flexor retinaculum and carpal tunnel
• Humerus
• Hypothenar muscles
• Infraspinatus
• Intercarpal and carpometacarpal joints
• Interossei of the hand
• Latissimus dorsi

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